Oh god I can't stop laughing
The only thing that distinguishes every person who served in the military from everyone who didn't is that they served in the military, where (at least in most branches of the american service) they learned how to follow orders above all else.
Truly, those are qualities you want in people deciding things.
You are assuming, without any basis in reality, that people in the military would always and without question make better leaders. That the hearts of the defenders of the state are so pure that no amount of self-serving power brokers could possibly lead your state to disaster.
The only thing you're doing is to preempt one of the failure states of democracy by skipping the democracy bits and going straight to oligarchy. Actually, come to think of it, you're basically going directly for something that is functionally indistinguishable from a theocracy.
Yeah, you must really love Freedom.